LM75ADP,118 Integrated Circuit Chip , Digital Temperature Sensor / Thermal Watchdog Holt Integrated Circuits
electronics ic chip
,integrated circuit components
LM75ADP Integrated Circuit Chip , Digital Temperature Sensor / Thermal Watchdog Holt Integrated Circuits
Digital temperature sensor and thermal Watchdog
FEATURES
• Pin-for-pin replacement for industry standard LM75 and offers improved temperature resolution of 0.125 °C and specification of a single part over power supply range from 2.8 V to 5.5 V.
• Small 8-pin package types: SO8 and TSSOP8
• I 2C-bus interface with up to 8 devices on the same bus
• Power supply range from 2.8 V to 5.5 V
• Temperatures range from –55 °C to +125 °C
• 11-bit ADC that offers a temperature resolution of 0.125 °C
• Temperature accuracy of:
±2 °C from –25 °C to +100 °C
±3 °C from –55 °C to +125 °C
GENERAL DESCRIPTION
The LM75A is a temperature-to-digital converter using an on-chip band-gap temperature sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an over-temp detection output. The LM75A contains a number of data registers: Configuration register (Conf) to store the device settings such as device operation mode, OS operation mode, OS polarity and OS fault queue as described in the functional description section; temperature register (Temp) to store the digital temp reading, and set-point registers (Tos & Thyst) to store programmable overtemp shutdown and hysteresis limits, that can be communicated by a controller via the 2-wire serial I2C-bus interface. The device also includes an open-drain output (OS) which becomes active when the temperature exceeds the programmed limits. There are three selectable logic address pins so that eight devices can be connected on the same bus without address conflict.
The device is powered-up in normal operation mode with the OS in comparator mode, temperature threshold of 80 °C and hysteresis of 75 °C, so that it can be used as a stand-alone thermostat with those pre-defined temperature set points.
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